Lister-cultivator.



C. H. MELVIN. a

LISTER CULTIVATOR. APPLICATION FILED ocT.12. 190s.

1,150,380. Patented Aug. 17, 1915.

C. H. MELVIN.

LISTER CULTIVATOR.

APPLICATION FILED OCT-12I 1908. v 1,150,380. PatentedAug. 17, `1915.

5 SHEETS-SHEET 2.

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CGLUMBIA PLANOGRAPM co.,\v^sHlNnToN. D. c.

C. H. MELVIN.

LISTER CULTIVAIOR. APPLICATION FILED ocr.12. 1908.

1,150,380. Patented Aug. 17, 1915.

5 SHEETS-SHEET 3.

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f l l COLUMBIA PMNDGRAPH Co.. WASHINGTON D c C. H. IVIELVIN.

LISTER CULTIVATOR.

APPLICATION FILED ocT. I2, 1908.

1,150,380. Patented Aug. 17, 1915.

5 SHEETS--SHEET 4.

oLuMBIA PLANOGRAPH C0.,\v^sHINcToN. D. c.

C. H. MELVIN.

LISTERCULTIVATOH.

anciana/13 v CHARLES n. MELvIN, .0E

` nnrrnn srarns ramena ernten.

To all fau/wm it may concern:

companying drawing.' Y A rThis invention relates tolcultivators and. particularly tolister cultivators, that is cul-f tivators designed for the cultivation of corn plantedinthe furrowsmade by lister plows.

ln cultivators of this sort, small solid disk wheels are used to support the frame parts. which travel in the furrow upon-either sidev of its center line. VIn the case of a two-row cultivator it has been found necessary to so mount the tool-carrying frames that they may have freedom of movement toward and from each other, so that the supporting wheels may accommodate themselves to the deviations of the furrows from the straight line.

One of the objects of my invention is to provide improved mechanism for permitting this freedom of movement of the tool frames transversely of the cultivator, which will at the same time'v tend to return the frames after such a transverse movement as speedily as possible to their normal positions.

y Other objects of my invention vwill be manifest from a reading of .the specification and drawings and some of these objects are not necessarily limited to a twofrow `cultivator only, but-are equally` desirable ofvattainment with one-rowv cultivators.

ln the drawings, Figure l is a plan `view of the cultvator with the -tools arranged for the first cultivation; Fig. 2 is a detail plan view of one of the toolscarrying frames. Fig. 3 is a view in side elevation of the same. Fig. 4 is a lrear perspective View of the same, showing the tools arranged .for the first cultivation; Fig; 5 is of a similar view, showingthe parts arranged for the second cultivation-- Fig.' 6 is a rear perspective view of one of the tool frames, showing the tools arranged forthe third cultivation.

The machine consists of the main or seat frame upon which the seatl and levers are mounted and the cultivator frames secured to the seat frame, one ateachside of the y machine and carrying the supporting wheels and cultivating tools. The seat frame is MoEINEfJrLINoIs, AssIGNoR 'ro DEERE a COMPANY, A.

oonrona'rron oEvILLINoIs.

Lstrnn-GULTIVATOR.

y1 spcificationof Leners Patent. Patented Aug. 1*?, 1915. 1 Appiicanbnmedoetober12,1908. seria1n0.457,356. n i

i made up of the seat bar l, carrying at its Y Be it known that I, CHARLES MELVIN, a" citizen ofthe UnitedaStates, residing at rear lendthe -.seat 2, and the crossbars 3, 4;, which are rigidly attached to the seat bar l.V The tongue 5 of each of the cultivator frames is secured to the cross bars Y3 and -4 1n` a manner toprovide a combined sliding and pivotal engagement in each case. To

accomplish this result, cross bar 3is loosely lpassed Y. through the eye of the eye-bolts 6 which are swiveled or pivotally mounted in the tongues 5, respectively, and the rear ends of the tongues 5 are' bolted or otherwise pivotally attached to the movable slide bars 7 on the cross bar 4. rllhis mode of connecting the tongues to the main frame permits the two cultivator frames to approach each other, or to recede from cach other, when the irregularities of the furrows require such rela-tive movement, and at the same time makes it possible for one tongue to be pulled ahead of theother without throwing the parts out of adjustment or out ofA their straight line of travel. The usual slight play or relative motion allowed by loose connections between the parts and by the elasticity of the cross bars will permit a slight pantograph movement of the frames rela- ,tive to each other. This pantograph movement is limited by the rigid attachment of the seat bars to them, which prevents the cross bars from approaching each other at theircenters. It has been found in practice that one of the tongues can be pulled a foot vor more ahead of the other before the rigid character of the connections between the 4cross bars and the seat barputs a positive stopte any further relative movement of the frame parts.' The slidingmovement of the cultivator vframes upon the main frame is equalized on each side of the machine by means of the lever 8 medially pivoted to` the seat bar 1 between the cross barsand the links 9, 9, which pivotally connect opposite arms of this lever S with the tongues 5, 5. In this manne-r the seat bar is maintained in a position midway between the tongues'irrespective of the positions'of the latter in respect v to thev Seat frame.

Describing now one of the cultivator frames, the tongue 5 is rigidly attached by an `end bracket or strap l0 and side braces 11, 11 to a rear transverse frame bar 12, which is shown comprising two beams bolted together. This rigid draft frame is further Vstrengthened by means of the cross bar 1 3 bolted to the side braces 11 and to the tongue 5. The bar 12 is -mounted upon a divided arch 14, 14, each one-half or' which Vis pivotally mounted on a horizontal axis in one Vof `the sleeve bearings 15, which latter are adjustably secured by clamps 16 to the transverse frame member 12.V Each oi' these arch members 14, 14 is a U-shaped tube,

havinga vertical part 'corresponding tothe fbottom of the U and an vupper andlower horizontal part, the upper journaled as before said, in one or' the sleeve bearings 15, and the lower lcarrying one of the "frames upon which are mounted the supporting wheels and the cultivator'rigs. The brace rods 17 are shown as connecting the outer ends of the horizontal parts of these arch members. Y Y

:Sleeved vuponl the lower horizontal part of each of the U-shaped members is a frame 'piece 18 which' is held against rotation by means of an upstanding arm 18b which engages the vertical part of the U-shaped member 14jor 14. That part 18a kof each frame piece which is sleeved upon the cor responding arch member is square in its exterior cross sectional outline. Upon these square parts are adjustably clampedV the bearing boxes 19 of the pivotal wheel-carrying standards or Vcaster spindles 20. These pivot standards or caster spindles carry the pivotal supporting wheels 21. Braces 60, 60

are provided which connect the inner ends ot' the fram'epieces 18 with the forward part of the cultivator frame. Preferably these braces 60, 60 are connected to the braces 11, 11. Means are provided :tor case tering' the two supporting wheels of each pair in unison. Such means comprises the crank arms 22, 22, the connecting rods 23, 23, which are adjustably secured together in the transversely movable block 24, and the link 25 connecting' this block 24 to the lever 26. This lever 26 is pivoted to the cross barv 4 at a point adjacent the seat bar and is provided with the usual segmental rack 27 and 'the spring'actuated manually releasable dog mechanism for fixing the lever in any desired position of adjustment.

In Fig'. 1 the culti'vator is shown with the parts in normal position. The centers of `the two cultivator frames are separated from each other by a distance equal to twice the distance between rows, alternate rows being cultivated at one time. When the parts are in this normal position, the supporting wheels 21, 21 are parallel with each other and with the longitudinal parts of the fi-ame. The cultivator frames are, however,

freeto move transversely relatively to each other in accordance with variations in the ldistance between the rows. By means of the lever 8 and the links 9, 9, which have been described, the main or seat frame 1s between the two cultivator frames. A-

It will be observed that while the supporting wheels are carriedby the cultivator or tool trame, the levers for castering` these wheels are lmounted upon theV mainframe. Assuming' the hand levers 26,l 26, to be in lixed positions or adjustment, the links V25,V

Vmantaned in a' central' j aosi'ti'on midway'- vof 25 will 'cause the supporting' wheels Vto beV inclined inward when the cultivator frames are moved outward bythe engagement,V of the wheels with the sidesv ofthefurrows. This inward inclination ot' theA wheels at once tends to return the cultvator Vtrames inward tov their lnormal positions. Similarly, the supporting` wheels willV be inclinedY `outward when the cultivator Y frames are moved inward and there Vwill at once be a v tendency for the wheelsybecause of their inclination, to return the .trames outward to .their normal positions.. The normal transverse distances between thefcultivator frames can be regulated byv changing the-positions of the levers 26," 26; Any tendency of one tea-m to move ahead of the'other is resisted by the corresponding casteriny; movement of the supporting wheels .out ot' parallelism with the line of motion of the machine..V

This castering movement of the wheels is resisted and prevented by the engagement of the wheels with thewalls of the furrows.

lRearward extending: lugs 18C, 1S? are pro- "right-angled bar 32, secured at its forward endto the cross bar 31 and at its inner end to the rear end of supporting bar 30, an Lipright bar 33 at the rear end of the .bar 30 and a brace rod 34 connecting'the forwardhorizontal part of the rig frame with the up-f right bar 33 near its upper extremity. A

end ot the upright 33 in a manner to permit itsuniversal adjustment with respect to the rig frame. This adjustment ispreterably made possible, as Vindicated in Fig. 6, by means of an intermediate bracket hav-.

vingv a pivotalrose plate connection with the upright 33, and also having a pivotal rose plate connection with the spindle upon upon which the disk is mounted, the axes of the two pivotal connections beingiat Vsubstantially right angles.

The supplementary tool frame 36 is pivotally connected to the rigr frame at its rear end at 36a, 36a so that it can be free to swing cultivator disk 35 is mounted upon the lower supplementary frame is provided with a tool-holdingfclamp 37 at its rear end in which is mounted the arm 38 carrying `at its lower end the cultivator blade 39. This cultivator blade can be shifted tov aposition in front of the cultivator disk 35 by removing it from the tool-holdingcla'mp 37 and fastening itin position at the forward end of the rigframe inthe clamp 40.

The two supplementary blade-carrying frames of each rig can be simultaneously swung upwardlyfby means of the lifting Y rods 41, the rock shaft .42, the -latter being journaled in brackets 43 bolted to the rear upper side of the uprights 33, and the hand lever 44 adj ustably secured to the rock shaft.

- against upward movement.

can, however, by means of the hand lever 44V The rock shaft is connected to the lifting rods 41 by means of the short crank arms 45 one of which is'adjustably secured to the rock shaft and extended to form the hand lever 44. It will be noted that when the parts are inthe positions shown in Fig. 3 the vrear part of the rig frame is locked The operator easily release the lock and elevate the rear art. p Each of the uprights 33 is provided at its upper end with an inwardly projecting integral horizontal extension 4G adapted to overlap the extension of the other upright and to be clamped in any one of a number of positions of adjustments to the said other extension. The clamping bolts 47, by which thesetwo horizontal arms 46 are secured together serve, at the same time, to bind in position between the two'. arms, the abutment plate 48. Rigidly mounted upon the tongue strap 10 is a bracket 49 on which is pivotally mounted the hand lever 50 and with the bracket is integrally formed the segment rack 51a designed to coperate with the usual'spring-actuated manually releasf able dog vmechanism upon the lever arm A to liX the said arm in any one of a number of positions as desired. vThe rod 52 serves to connect the lever 50 with the rig frames,

' it 'being pivotally connected with the former near its inner end, and slidably positioned in a circular aperture in the abutment plate 48, its forward'movement relative to the abutment plate being limited by thecotter pin 55.

A spring 53, sleeved upon the rod 52, abuts at one end against the collar 54 rigidly secured upon the rod and at the other end against the abutment plate 48. A ten-V sion spring 56 connects the segment rack 51 to the outer end of the hand lever 50 and' assists the operator in moving the lever forward to raise therig frames. The sprin'.

53 enables the operator to move the lever 52(3) as far back as desired at the beginning of the row without positively shoving thesoilin certain limits.

. ground may permit until thetools are forced down to the desired depth.

At the rear end of each of the rig frames ,there is pivotally connected atA 36a, 36a a supplementary tool frame 3G. Each supplementary frame is provided with a tool- Vholding clamp 37 at its rear end in which is mountedthe arm `38 carrying at its lower end the cultivator blade 39. This cultiva-tor blade can be shifted to a position in front of the cultivator disk 35 by removing it from the toolholding clamp 37 and fastening it in positionat the forward end of the rig frame inthe clamp 40. p A

The two supplementary bladecarrying frames can be simultaneously swung upward by means of the lifting rods 41, the rock shaft 42,l the latter being journaled in brackets 43 bolted to the rear upper side of the uprights 34, and the hand lever, 44 adjustably secured to the rock shaft. The rock shaft is connected to the-lifting rods 41 by means of the short crank' arms 45, one of to their work, connecting rods 51 are attached at one end to the forward part of the rectangular frame piece 18 and at the other end to vertical bars 58 which depend from the doubletree 59 and to which are medially secured the swingletrees 59u. `The arch members and parts carried rigidly thereby are held in fixed position relative to the upper horizontal frame work 11, 12 by means of the rods or braces G0 which have been before referred to. The ends of the braces` are forinedwith hooks which engage apertures in the frame pieces 18 and in the side brace 11. This manner of engagement allows a universal swinging of the rods with respect to the parts to which they are secured with- `When the arch members 14, 14 are moved transversely along the frame bar 12 and clamped in some new position of adjustment, these -rods (50 adapt themselves to the new position without i'equiring the attention of the operator.

For the first cultivation, the parts of the implements are arranged as shown in Fig. 4. The half members of the arch 14, 14 are ,brought close together, the disks are ararranged, as shown in Fig. V5, the disks being inclined inwardly Vand rearwardly to Orowth which ma be )resent of the young plants, and the cultivator blades` are shifted to the rear holder upon f the swinging supplemental frame 36.

AFor the third cultivation when the plants have reached a later stage of development,

the 'half members of the rig-supporting arches are moved apart as shown in Fig.r 6,

` and the disks set ata greater angle of inclination to throw what is left of the ridges into the furrow to completely level the groundaboutthe corn, the cultivato'r blades acting, as in the second stage, to loosen up the ground which has been packed down by v said levers inany one of a number of posithe horses and to remove any foreign porting wheels are moved from their inner positions upon the half members ofthe arch which they occupied during the first two stagesof cultivation to positions well out toward .the other ends of the arch members. During this third cultivation, the land cannot be depended upon to guide the supporting wheels 21 and the lever 2G only is relied upon to hold the wheels to their normal position.

When it is so desired, the swinging supplemental frames 36 can be swung upwardly and the disks 35 used alone to cultivate theV plants.

What I claim is:

l. In a cultivator, tlie combination of a main frame, two tool-carrying frames one at each Vside of the main frame and bodily movable with respect thereto, supporting wheels for each of said tool frames, each ,wheel being adjustable about an upright axis normally fixed with respect to the vcorresponding tool frame, and leverinechanism mounted on the main f'ame for adjusting the said wheels about the said axes.V

2. In a cultivatoi', the combination ofa main frame, two tool-carrying frames one atv each side of the main frame and movable with respect thereto, supporting wheels for each of said tool frames, each wheel being ladjustable with respect to the mainframe 50 and the corresponding tool frame about an upright axis normally fixed with respect to the tool frame, and levermechanism mounted on the main frame for adjusting the said wheels about the said axes.

In a cultivator, the combination of a main frame, tool-carrying frames secured one to each side of the main frame in a manner to permit transverse movements with respect to the main frame, supporting The suping means connecting the Vmain frame to the justing means, respectively, and means for fixing each of said levers in any one of a number of positions relative to the main frame.

. 4. In a cultivatoiyltlie combination'of a respect to the main frame, supporting wheels for each of the tool-carrying frames, means for angularly adjustingtlie wheels of one frame, a second independent means for angularly adjusting the wheels-of tlielother' frame, levers'mounted upon the main frame operatively connected to the two adjusting means, respectively, means for fixing each of tions relative tothe main frame, and equaliztool-carrying frames' for maintaining the main framein a central'position-with respect to the tool-carrying frames irrespective of the transverse `movements of the latter'. Y i f 5. In a cultivator, the combination of a main frame, tool-carrying frames secured one to each side of the main frame in a manner Vto permit transverse movement with respect `to the main frame, pairs of supporting wheels one for each tool carrying frame, and means for angularly adjusting each pair of supporting wheels, said means being operated by movements of the Vtool-carrying frames transversely with respect to the main frame. Y

`6. In a cultivator, the combination of a main frame, a tool-carrying frame secured to one side of the main frame anda-toolangular Vmovement of the tool-carrying frame in horizontal planes with respect to the main frame. and to permit transverse -moveiiient Vof the tool-carrying frame with respect to the main frame, sets of supporting wheels one for each Vtool-carrying frame, means for each set ofv supporting wheels operable by the transverse movement ofv the tool-carrier frame with respect to the main frame to aiigularly adjust the wheels.

7.*In a cultivator, the combination of a Vpair of cultivator mechanisms adapted to simultaneously cultivate two rows of plants,

a central frame joining the two mechanisms on which each is free to slide laterally, supporting wheels foreach mechanism, vertical spindles therefor adapted to be angled about vertical axes, and systems of devices connecting each spindle with the central frame, and tending to automatically retard any angling of the wheels resulting from the action uponv them of the walls of a furrow; i

8. In a lister cultivator, the combination of a main frame, two tool frames connected with the main frame, supporting wheels for sof ioo

`forward or backward movement with respect to the tool frames or the main frame, forward extending tongues for supporting and balancing the said main and tool frames, two pairs of disk-carrying frames connected respectively tothe'tool frames and vertically adjustable relatively thereto, disks on the .disk framesand arranged on opposite sides of the respective plant rows, two pairs of blade-carrying frames, respectively connected to and carried by the diskcarrying frames to be movable therewith but vertically adjustable relatively thereto, and cultivator blades on the blade-carrying frames. j

9. In acultivator, the combination of a tongue frame, a pair of vertically depending i bars 14, 14: hinged to the rear end of the frame on a horizontal transverse axis, and transversely slidable thereon, a wheel mounting securedto each of said bars, tool supporting mechanism mounted on each of said bars, a pair of swinging lhitch rods 58 depending from forward parts of the tongue frame, a pair of tension rods each universally connected at its forward end of the lower end of one of the hitch rods, and at its rear end to one of the depending rods 11i, 14, and a pair of supplemental rods each universally connected at its forward end to forward parts of the tongue frame and at its rear end to one of the depending rods 14, '14. Y j

10. In a cultivator, the combination of a pair of cultivating mechanisms adapted to cultivate simultaneously two rows ofplants, a frame joining the two cultivating mechanisms, supporting wheels for each mechanism, means for holding the forward parts of the said supporting wheels transversely stationary withrespect to theuniting frame, the rear parts of thesupporting wheels being free to move transversely so as to angle the supporting wheels about their forward edge parts as a vertical axis. j j

11. In a cultivator, the combination of two cultivator mechanisms adapted to cultivate simultaneously two rows of plants, a frame uniting the two mechanisms to which each of the said cultivating mechanisms is slidably connectedy and supporting wheels for each of the said cultivating mechanisms adapted to be angled with respect to the cultivating "mechanisms about their verticalV diameters as an axis and with respect to the uniting frame about a vertical axis in front of the vertical diameter.

12. In a cultivator, the combination of a main frame, a tool-carrying frame secured to one side of the main frame in a manner to permit transverse movement with respect thereto, a second tool-carrying frame secured to the other side of the `main frame in4 a manner to permit `transverse movement with respect thereto,` supporting wheels `for each of the tool-carrying frames, means for angling` each of the supporting wheels with respect to its tool-carrying frameabout its vertical diameter as an axis and with respect to the main frame about a vertical-axis in front of its vertical diameter, and means for adjusting transversely the positions of the said vertical axes about which the wheels are angled with respect to themain frame.

13. In a cultivator, the combination of a main frame, a tool-carrying frame secured to one side `of the main frame in a manner to normally permit transverse bodily movement with respect thereto, a second tool-carrying frame secured to the other side of the main frame in a manner to normally permit transverse bodily `movement with respect thereto, and means interposed between the respective tool-carrying frames and the main frame tending to maintain the toolcarrying frame in definite positions with respect to each other and to the main frame, the said means being automatically yieldable to permit relative transverse movement of the tool-carrying frames.

11i. Ina cultivator, the combination of a main frame, a tool-carryingframe secured to one side of the main frame in a manner to normally permit transverse bodily movement` witlrrespect thereto, a second toolcarrying frame secured to the other side of the main frame in a manner to normally permit transverse bodily movement with respect thereto, means interposed between the respective tool-carrying frames and the main lframetending to 4maintain the former in definite positions with respect to the'latter, the said means being automatically yieldable to permit relative transverse movement of the tool-carrying frames, Vand mechanism within the control of the operator for adjusting the said means to vary the normal disof normal positions to incline the wheels in l directions such that they tend to return the frames to normal positions as the cultivator advances.

16. (In a cultivator, the combination of a mainframe, a tool-carrying frame secured to one side of the mam frame2 1n a manner to permit transversemovement with respect thereto, a second tool-carrying frame secured tothe other side of the main frame in a manner to permit'transversev movement with respect thereto, supporting wheels for the toolcarrying frames each adapted to be angled about a vertical axis, automatic mechanism for angling the said wheels, the mechanism serving when the frames are out of normal positions to incline the wheels in directions such that they tend to return the frames to normal positions as the cultivator advances, and devices within the control of the operator for adjusting the said automatic mechanism to change the normal positions of the frames.

17. In a cultivator, the combination of a main frame, a tool-carryingframe securedV to onefend of the frame in a manner to permit transverse movement with respect thereto, supporting wheels for thetool-carrying frame each adapted to be angled about a Y vertical axis, automatic Vmechanism for angling the said wheels, the mechanism serving when the tool-carrying frame is moved out of normal position to incline the wheels in a direction such that they tend to return the frame to its normal position as the cul-V tivator advances, a second tool-carrying frame secured to the otherV side of the main frame in a manner to permit transverse movement with respect thereto, supporting wheels for the second tool-carrying frame each adapted to be angled about a transverse axis, and a second automatic mechanism for angling the wheels ofthe second tool-carrying frame, the said mechanism serving when the tool-carrying frame is moved out of normal position to incline the wheels in a direction such that they tend to return the frame to itsnormal position as the cultivator advances.

18. In a cultivator, the combination of a main frame, a tool-carrying frame secured to one end of the frame in a manner to permit transverse movement with respect thereto, supporting wheels for the tool-carrying frame. each adapted to be angled about a vertical axis, automatic mechanism for angling the said wheels, the mechanism serving when the tool-carrying frame is moved out of normal position to incline the wheels in a direction such that they tend to return the frame toits normal posltion as the'cultivator advances, a second tool-carrying frame secured to the othersidc of the main frame in a manner to permit transverse movement with respect thereto, supporting wheels for the second tool-carrying frame each adapted to be angled labout a vertical axis, a second 4automatic mechanism for angling the Wheels Y of the second tool-'carrying frame, the saidL mechanism serving when the tool-carrying frame is moved out of normal position to Uincline the wheelsin a direction such that they tend to return theframe to its normal position as the cultivator advances, and anV automatically acting device for maintaining the main frame centralwith respectto I the tool-carrying frames.

19. In a cultivator, the `combination Vof a main frame, two tool-carrying frames se-4 cured to the main frame, oneat each side thereof, in a manner to permit transverse Vmovement' with respect'thereto, supporting wheels for vthetool-carrying frames each adapted to be angledabout a vertical axis,

an automatic mechanism for angling the wheels of one tool-carrying frame, a sec- -ond mechanism for angling the wheels of acting device for maintaining the mainv frame central'wth respect to the tool-carrying frames, and means within the control of the operator for adjusting the automatic anglingmechanism to change the normal positions of the tooljcarryingV frames.

20. TheY combination with a cultivator frame, of two downward extending trans'- v verse elements secured to the frame and transversely adjustable with respect thereto, supporting wheels one secured to each of the said elements in a mannertopermit transverse adjustment. with respect thereto, and y tool-carrying rig frames one secured to each ico of the elements in a manner to permit transj verse adjustment with respect thereto, the

said wheels and rig frames'throughout the'V entire range of, adjustment'being each movable with respect 'to its' element independently of the other.

21. In a lister cultivator, the combination of a main frame, a'tool frame connected,V

with the main frame, supporting wheels for the Vmain and Vtool frames, means for holding the wheels against forward or backward movement-with respect to the tool frame or the main frame, a'rig' frame connected to the tool frame for-movement about Ya trans'- lverse horizontal axis, and comprising two pivotally connected parts, means for moving the rig frame'about theV said axis, a soil working device connected to the forward part of the rig frame, asoil working device connected to the rear part of the rig frame, and means for locking the two parts of the rig frame in fixed positions relative to each ilo Y other, or for elevating the rear Vpart with respect to the forward part .about its axis of pivotal connection. j, 'g j 22. In a lister cultivatoncthe lcombination Vof a mainframe, a tool frame connected with the main frame, supportingl wheels for` the main andtool frames, means for holding the wheels'V against forwardV or backwardrmovement with respect to the tool frame or the main frame, two rig frames connected' the rigframes, and means for locking the two parts of bothrig frames in fixed positions relative to each other or for simultaneously elevating the rear parts of both frames with respect to the forward parts.

23. In Va lister oultivator,4 the combination of a main fame, a tool frame connected with the main frame, supiorting wheels for the main and tool frames, means for hold-` ing the lwheels against forward or backward Vmovement with respect to the tool 'frame or the main frame, two rig frames connected tothe tool frame for movement along vor about a transverse horizontal axis and each comprising two pivotally connected parts,

means for moving the frames about the said transverse horizontal axis, soil working devices connected with the forward parts of the rig frames, soil working devices connected with the rearparts ofthe rig frames, and means for simultaneously locking the two parts of both rig frames in fixed positions relative to each other or for simultaneously elevating the rear parts with ..re-

spect to the forward parts, the saidk means being operative` for all lpositions of'transverse adjustmentof the frames.

In a lister. cultivator, thecombination of a main frame, two toolfraines connected with the main frame, supporting wheels for 'the main and tool frames angularly adjustable about vertical axes and arranged with their ground-engaging points and the said axes all in the same transverse vertical plane, means forholding the wheels against forward or'baclrward movement with'resp-ect to the tool frames or the main frame, the said frames being freely movable about the common transverse axes of the wheels,

forward extending tongues for supporting and balancing the main and tool frames, and

tool-carrying rig .frames connected to the tool frames for movement with respect thereto about fixed transverse horizontal axes` 5. In a lister cultivator, the combination of a main. frame, two tool frames connected with the main fram-e, supporting wheels for the main and tool frames angularly adjustable about vertical axes and arranged with their vrouncl-ene'aeinfr oints and the said -i E: n t3 axes all in the same 'transverse vertical plane, means for holdingv the wheels against forward or backward movement with respect to the tool frames or the main frame,

the said frames being freely movable about the common transverse axes of the wheels, forward extending tongues for supporting and balancing the `main and tool frames, tool-carrying rig frames connected to the tool frames for. movement with respect thereto about iiXed transverse horizontal axes, and manually controllable means for moving the said supporting wheels angularly to dilferent positions.

26. In a 'cultivaton the combination of a main frame, a tool-carrying frame secured to one side of the main frame in a manner to permit transverse movement with respect thereto, a second toolframe secured to the other side of the main frame in a manner to permit transverse movement with respect thereto, supporting wheels for the toolV frames each adapted to be angled about a vertical axis, automatic mechanism for angling the said wheels, the mechanism serving when the frames are out of norma positions to incline the wheels in directions suoli that they tend to return the frames to y normal positions as the cultivator advances,

and devices mounted on the main frame within the control of the operator for adjusting the said automatic mechanisifn'to change the normal positions of the frames.

27. In a lister cultivator, the combination of a main frame,two tool frames connected one to each side of the main frame, two supporting wheels for each tool frame each wheel being adapted to be angled with respect to its frame about a vertical axis, and

connecting devices between the supportingwhe'els ofone tool frame and the supporting wheels of `the otherltool frame for causing the simultaneous angling of all. of the wheels.

'25. In a lister CultiVatOr, the combination of a main frame, To tool frames connected one to each side ot the main frame, support- `ing wheels for the tool-carrying frames each adapted to be angled with respect to its tool frame about a vertical axis, and a connecting device between the supporting wheels of one tool frame and the supporting wheels of the other tool frame for causing all of the wheels to be simultaneously angled inward or simultaneously angled outward.

29. In lister cultivator, the combination of a main frame, two tool frames connected one to each side of the main frame, two supporting wheels for each tool frame each wheel being adapted to be angled with respect to its frame-about a vertical aXis, manually controllable means for angling the supporting wheels for one tool frame, and connecting devices between the supporting wheels for the said frame and those for the other frame to effect adjustment of the wheels of the second said frame simultaneously with those of the i'irst.

30. In a lister cultivator, the combination of a main frame, two tool frames connected ,ice

one to each side of the main frame in a.lman ner to permit transverseY movement with respect thereto, supportingwheels for the tool frames, each adapted to be angled with respect to its frame about'a vertical xanis, connections between each wheel and the main frame for angling the wheel when there is relative movement between the main frame and the corresponding tool frame, and a connecting device between the supporting wheels of one tool frame and the supporting wheels of the other tool frame for causing the simultaneous angling of the wheels.

31. ln a lister cultivator, the combination of a main frame, two tool frames connected one to each side of the main frame in a manner to permit transverse movement with respect thereto, supporting wheels for the tool frames, each adapted to be angled with respect to its frame about a vertical axis, connections between each wheel and the main iri me for angling the wheel when there is relative movement between the main frame and the corresponding tool frame, and a connecting device between the sii-pportiirgl wheels of one tool frame and the supporting wheelsV of the other tool frame for causing Vthe wheels of both frames to be simultaneously angled inward or to be simultaneously angled outward.

3Q. In a lister cultivator, the combination of a main frame, two tool frames connected one to each side of the main frame in a manner to permit transverse movement with respect thereto, supporting wheels for the tool frame eachadapted to be angled with respect to its frame about a vertical axis, connections 'between the main frame and the;

supporting wheels for one tool frame where-ff by the wheels are angled when there is relai,

tivemoveinent between the main frame and Y the corresponding tool frame, manuallyeonl trollable means for adjusting the said connections, and a connecting V'device betweenv the supporting wheels for one Vframe andthe supporting wheels for the other `frame to cause simultaneous vangling of all of the wheels. Y i Y 33.v In a lister cultivator the combination of a main frame, two tool frames connected one to each side of the main frame in a manner to permit transverse movement with ref spect thereto, supporting wheels for the tool frame each adapted to be angled with re angling movement of the wheels of oneframeV is transmitted to simultaneously anglel the wheels of the other frame. Y

In testimony whereof I ailiX` my signature in presence of two witnesses.

Y 'CHARLES H. MELVIN.

Vitnesses: Y Y

EUGENEL. TAYLOR, Y Roy E. ANDERSON. f

Copies of this patent may be obtained for iive cents eaoh, 'by addressing the Commissioner of Patents,

Washington, D. C. i 

